What are the reasons for the car air conditioner not cooling and how to solve it?

[VanKeegan]

Here are the reasons why a car air conditioner may not be cooling and the corresponding solutions: 1. Lack of refrigerant. It is necessary to add refrigerant. When adding from the low-pressure side, pouring from the refrigerant bottle is prohibited. When adding from the high-pressure side, starting the engine is prohibited. After filling, check for severe leaks. 2. Long-term lack of maintenance, leading to dirty air filters and condensers. A thorough cleaning of the air conditioning system is required. 3. The air conditioning compressor is not working. You can initially check if there is a problem with the compressor by directly supplying power to the compressor's electromagnetic clutch. If the issue is with the compressor, it is recommended to leave it to professionals to handle. 4. The car air conditioner compressor drive belt is loose, causing the compressor speed to drop and reducing the delivery of compressed refrigerant, which results in the car air conditioner not cooling. The drive belt needs to be tightened or replaced with a new one.